Thanks for the replies.   Unfortunately, my player died after running Rockbox for a couple of days. Maybe the missing switch made the thing more unstable, I don't know, but anyway now it is hopelessely bricked, and the only hope of recovery is to wait until someone publishes a tutorial on...

Hello,   Thanks so much for this tutorial on how to fix this loose heapdhone plug problem that has been nagging me for months (I was just about to buy a new DAP when I found this, so I ended up ordering a much cheaper soldering iron :)   However I'm a little clumsy and when I pried open...